Alibaba’s PolarDB is a new-generation, cloud-native relational database service. It decouples computing from storage, providing auto-scaling, high performance, and mass storage.
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| Product Capabilities and Details: PolarDB (Exam) | Alibaba |
Alibaba’s PolarDB is a new-generation, cloud-native relational database service. It decouples computing from storage, providing auto-scaling, high performance, and mass storage. PolarDB is fully compatible with MySQL and PostgreSQL, and highly compatible with Oracle. It offers three engines: PolarDB for MySQL, PolarDB for PostgreSQL, and PolarDB for Xscale. This service is secure, reliable, and has been proven effective through years of best practices in Double 11 events.
Notice!
Always refer to the official Alibaba Documentaion for the most accurate and up-to-date information.
Exam Question
Single answer1.Which of the following PolarDB MySQL versions has the most rich functionalities?
A. 8 ✔
B. 5.7
C. 5.6
B. 5.7
C. 5.6
Single answer
2.Which of the following PolarDB MySQL versions is the most stable?
A. 8
B. 5.7
C. 5.6 ✔
B. 5.7
C. 5.6 ✔
Single answer
3.Which of the following is the algorithm PolarDB uses to gain data consistency in PolarStore?
A. Gossip
B. Paxos
C. Zoo Keeper
D. Parallel Raft ✔
B. Paxos
C. Zoo Keeper
D. Parallel Raft ✔
Single answer
4.What is the networking technology PolarDB uses to provide high speed connection between computing nodes and shared storage?
A. CDMA
B. HDMA
C. RDMA ✔
D. FDMA
B. HDMA
C. RDMA ✔
D. FDMA
True/False
5.PolarDB provides a separate buffer pool so that it can gain extreme speed to restart or recover an instance.
True
False ✔
False ✔
True/False
6.By refactoring InnoDB's AIO system, PolarDB can adapt to high-bandwidth Polar File System and PolarStore so that AIO performance get approved at a higher rate.
True ✔
False
False
True/False
7.PolarDB supports "Fast DDL" so that with highly optimized parallel merge sort, big table's DDL latency can be reduced to 1/13 of original time.
True ✔
False
False
True/False
8.PolarDB supports "Single Table Recovery" function which can support recovery based on time point.
True ✔
False
False
True/False
9.PolarDB supports Database Full Encryption which means Data is encrypted end-to-end and the database does not use any visible data typed by user during operations.
True ✔
False
False
Multiple answers
10.Which of the following are MySQL versions does PolarDB support? (Number of Correct Answers: 3)
A. 5.6 ✔
B. 5.7 ✔
C. 5.8
D. 8 ✔
B. 5.7 ✔
C. 5.8
D. 8 ✔
Multiple answers
11.Which of the following benefits can be gained from using Alibaba Cloud PolarDB 'Shared Storage' architecture? (Number of Correct Answers: 3)
A. When Primary node is not available, Replica node can be upgraded to Primary
node in 20 seconds ✔
B. Physical backup has a very low latency ✔
C. PolarStore makes 3 replicas of data so that data reliability is guaranteed ✔
D. Adding new computing nodes won't incur an extra storage expense
B. Physical backup has a very low latency ✔
C. PolarStore makes 3 replicas of data so that data reliability is guaranteed ✔
D. Adding new computing nodes won't incur an extra storage expense
Multiple answers
12.Which of the following capabilities are included in PolarDB Database Full Encryption Technology? (Number of Correct Answers: 3)
A. Data is not visible ✔
B. Data is processable ✔
C. When work with DTS or DBS, plain text Is needed ✔
D. Cross-Platform dense computing power
B. Data is processable ✔
C. When work with DTS or DBS, plain text Is needed ✔
D. Cross-Platform dense computing power
Multiple answers
13.Why is PolarDB considered as a "Global Database"? (Number of Correct Answers: 3)
A. It supports data cross region synchronization and disaster recovery ✔
B. Read accelerate by reading the nearest node ✔
C. Can write to multi-zones and regions ✔
D. Available in each Alibaba Cloud region
B. Read accelerate by reading the nearest node ✔
C. Can write to multi-zones and regions ✔
D. Available in each Alibaba Cloud region
Multiple answers
14.Which of the following are the new features does PolarDB provide? (Number of Correct Answers: 4)
A. Hash Join Optimization ✔
B. Fast Write Lock
C. Execution Plan Management ✔
D. Fast Query Cache
E. Transaction System Optimization ✔
B. Fast Write Lock
C. Execution Plan Management ✔
D. Fast Query Cache
E. Transaction System Optimization ✔
Multiple answers
15.Which of the following are special specs of Alibaba Cloud PolarDB General Version? (Number of Correct Answers: 3)
A. Only one computing node
B. 3 data replicas ✔
C. Availability SLA: 99.95% ✔
D. Support Read-Write splitting ✔
B. 3 data replicas ✔
C. Availability SLA: 99.95% ✔
D. Support Read-Write splitting ✔